Petesguitar

Hi I'm sure there are a lot of these threads but I will add it again! I will try to add as much info as possible regards what happened..And ask a few questions.


The engine stopped running just as if it had been turned off .. no juddering no misfires just a smooth stop .. while coasting or being towed in gear the coil light flashes but not when stood still. We have an OBD reader but will not work on this van!
I have opened injector pipe and seem to have fuel pressure so hopefully it's not the pump.
starting has been fine except for the recent sub zero days when she took a few attempts then ran a little rough but only for a few seconds then ran and started normally after that.
Although nearly 300k the engine was rebuilt about 30k ago and apart from a small oil leak seems good.

Q1, I presume contaminated fuel would have resulted in a misfire or some sort of rough running.
Q2, Would a fuel pump failure be instant and smooth?
Q3, I have heard there are some common electrical / wiring faults can you point me at any and where exactly are they located.

TIA

gcfcos

First things first mate u need to use a scanner that will talk to your van

Petesguitar

Indeed I am waiting to get hold of one (on order) . No one locally seems keen to come and look for some reason! Recovery and garage costs are out of question ATM so thought I would throw it out there first.

DangerousBryan

Is it definately a tdci and not a tddi? Tdci's are pretty rare that age. If it is a tddi and you can get a code reader that works on it(not many do other than Ford stuff on mk6's ) if you have fault codes p1564 and p1664 then the pump is toast and the van is probably scrap unless you can do it yourself.

Petesguitar

Thanks DB ,yes it is a tddi not common rail fortunately I can do work myself however my diagnostic skills are more suited to petrol engines with plugs points and a carburettor ��

DangerousBryan

The pumps are about 5-600 quid from Euro car parts and they come virginised so don't need programming. It's about a 4 hour job to change,just don't let the timing chain slip. There is a special tool available to hold the chain when you pull the pump out. You also need the timing pin.

Petesguitar

Thanks for info just looked at a locking kit for less than 30 quid but hoping it's not pump however there is a company not too far that rebuild them may be cheaper. Fuel does squirt well if you crack the injector pipe so fingers crossed.

Fullflush

If the pump went it would just be like running out of fuel

RUBY123

iTrader: (2)

more than likely the pump but get it plugged in to be sure. also dont toe the van the timing chain can jump easy on that engine

Petesguitar

Thanks for all the advice. We have replaced the ECU on the pump however I now get the fail to communicate error P1665 code have now checked all wiring and found that there is no voltage to pin 7 on pump. traced wire to relay and have 12V at relay and to power relay coil however relay fails to function when plugged in but works fine if I put 12 V direct to it!!
any Ideas on that one.

jamie's

Did you replace it with a new ecu or 2nd hand?

Petesguitar

Brand New ecu but the relay problem is a mystery.

RichieST

iTrader: (2)

Do the pumps need coding to the ecu?

Petesguitar

Not always so I am told but Ford tried to do it but came up with communication error it was a favour so couldn't ask them to spend time on it.
There is no power to pump but relay is good tested and works on bench and there is 12V power to the relay coil but relay does not work when plugged in! which in theory is impossible.

RichieST

iTrader: (2)

Does the relay have a good earth?

Petesguitar

It's a Ford they don't know what good earth is seriously however 12V in the sockets suggests there is but there may be some resistance causing non opp when under load, unfortunately the wiring seems to run through the ecu rather than a common earth so deeper investigation needed other relays don't show a good earth but work OK.. all a bit odd

RichieST

iTrader: (2)

Does it have a permanent live from ignition, then the relay has a switched earth from the ecu to trigger it?

Petesguitar

live and earth come from ECU apparently i have just tried adding a permanent earth which makes the relay work but still no start.